In an attempt to save energy, some young French citizens are turning off shop signs at night in an acrobatic way – a trend that has gone viral on social media. The parkour collective, On the Spot, has been somersaulting its way around Paris at night in a bid to reduce light pollution in the city and curb energy consumption. “Seeing so many signs lit up at night is incomprehensible to us,” a member of the group, Kevin Ha, says. “And for us ecologists, these civic activities allow us to move from words to actions.” The group has been praised by some local residents. Using parkour to switch off t…